Machine for crozing and chamfering staves



(No Model.) 2 Sheets-Sheet 1. J. GREENWODD.

MACHINE FOR GROZING AND GHAMFERING- sTAvEs. No. 373,736. Patented Nov, 22, 1887.

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(No Model.) 2 Sheets-Sheet 2.

J. GREENWOOD.

MAGHINB FOR OROZING AND GHAMPEBING STAVES. No. 373,736. Patented Nov. 22, 1887.

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UNITED JOHN GBEENYVOOD, OF ROCHESTER, NEW YORK.

MACHINE FOR GROZING AND CHAMFERING STAVES.

SPECIFICATION forming part of Letters Patent N0. 373,736, dated November 22,1887.

Application filed May 25, 1887. Serial No. 23 ,352. (No model.)

To all whom it may concern:

Be it known that I, JOHN GREENWOOD, of the city of Rochester, in the county of Monroe and State ofNew York, have invented new and useful Improvements in Machines for Orozing and Ghamfering Staves, of which the following is a specification.

This invention relates to a machineby which detached staves are crozed and chamfered; and it has for its object to produce a machine by which these operations can be effected without splitting or chipping the ends of the staves. In machines of this class as heretofore constructed this has been the principal difficulty, and the staves have therefore been generally set up in barrel form,and were then crozed and chamfered in this condition.

My invention consists of the improvements which will be hereinafter fully described, and pointed out in the claims.

In the accompanying drawings, consisting of two sheets, Figure l is a front elevation of my improved machine. Fig. 2 is a top plan view of the same. Fig. 3 is an end elevation thereof. Fig. 4 is a vertical cross-section in line a: m, Fig. 1, on an enlarged scale. Fig. 5 is a longitudinal fragmentary sectional elevation, on an enlarged scale, of one end of the machine. Fig. 6 is a perspective view of one of the arms on which the staves are supported.

Like letters of reference refer to like parts in the several figures.

A A represent the end frames of the machine; a, a longitudinal bar connecting the top portions of said frames, and a a longitudinal bars connecting the end frames on their front and rear sides.

B represents the cutter-heads, to which the crozing-knives b and chamfering-knives b are secured, and which are arranged at opposite ends of the machine and secured to horizontal shafts b The latter are journaled in bear ings c c, secured to a bed-plate, O, which slides in horizontal ways 0', formed on brackets C. These brackets are formed on the end frames, A A, so as to project from the outer sides of the latter. 0 represents pulleys, which are secured to the shafts 1) between the bearings c c and driven by belts 0 (2 represents the main shaft of the machine, arranged horizontally and journaled in hearing cl (Z mounted in the end frames, A A.

E represents the driving-pulley, mounted loosely on the shaft (2 on the outer side of the end frames, A A; and e represents a pinion secured to the pulley E on the inner side thereof.

E represents a loose pulley mounted on the extended hub of the pulley E.

frepresents a horizontal counter-shaft arranged helow the main shaft (1, and journaled in bearings f f, arranged in the end frames, A A, below the bearings d (if, and in an additional bearing,f which is secured to the horizontal tie-rods on the outer side of the end frame A.

F represents a gearwheel seen red to the end of the counter-shaft f and meshing with the pinion e. v

g represents a pinion secured to the counter-shaftf midway between the end frames, A A; and Gis a gearwheel secured to the main shaft at above the pinion g and meshing therewith. The bearings d f (1 f are arranged, respectively, in vertical ways h h, formed in the end frames, A A, and the upper bearings, d 6?, are supported on the lower bearings, f 7, by vertical rods h The lower bearings, ff are supported in the end frames by springs h, which permit both sets of bearings and the parts supported therein to yield downwardly when a stave of unusual thickness passes through the machine.

H H represent semicircular convex guidebars secured with their lower ends to the lon gitudinal front and rear bars, a a", of the frame, and extending over the main shaft d at right angles to the frame and on opposite sides of the gear-wheel G.

I I and J J represent segmental concave guide-bars secured to the underside of the top bar, a, between the guide-bars H and the side frames, A A, the guides I being lower than the guide-bars H and the guides J lower than the guides I, as clearly represented in Fig 5.

K represents a stave operated upon and arranged upon the guide-bars H and below the guides I J. whereby the proper bulge 0r curve is imparted to the stave. The guides J ,which of the staves from the outer side and level the staves, the out being so deep that it isintersected by the chamfering-knives, whereby the proj ecting end of the stave is severed.

L L represent the feed-wheels secured to the shaft (1 near the outer guides, J, and on the inner sides thereof. These wheels are provided on their inner sides with feed-dogs Z.

M M represent supportingqvheels mounted loosely on the extended hubs of the feed-wheels, and having their faces arranged near the outer guides, J, so that the ends of the staves are chamfered between the wheels M and the guides J.

N N represent horizontal bars which support the staves as they are introduced into the machine, and which serve the purpose of a feed-table. These bars are secured with the outer ends to the front bar, a, of the frame, and are provided at their inner ends with rings or hubs n, which encircle the hubs of the feed-wheels L, and which are retained thereon by collars a, secured to the shaft d.

0 represents segmental guidessecured to the outersides of thesupporting-bars N,and curved concentric with the shaft d at such a distance from the latter that the similarly-curved depending portions or tails l of the dogs Z will ride over the curved faces of these guides, as represented in Fig. 4, and be thereby caused. to clamp the staves placed against the faces of the loose supporting-wheels M. A stave being placed edgewise upon the bars N and against the faces of the wheels M, as represented in Fig. 4, the dogs Z, as they move upwardly on the front side of the machine, seize the stave and carry it upwardly and under the guides I and J until the tails of the dogs Z pass beyond the upper ends of the segmental guides 0, when the overhanging tails cause the dogs to turn on their pivots and release the stave.

" ping.

Each stave, after having been released by the dogs, is moved forward between the wheels M and the guides I and J by the next succeeding stave which is elevated by the dogs, so that when the staves pass the cutters their jointed faces are held in as close contact by the pressure exerted by the last stave inserted and moved forward by the dogs as they would be if they were set up in a barrel. This prevents the edges of the staves from splitting or chip- The finished staves are delivered from the guides I and J upon an inclined table, I, on the rear side of the machine. The loose supporting-wheels M permit the staves in the machine to remain stationary when no stave is fed in, while the feed-wheels L continue to rotate.

The feed-bar N, feed-wheel L, and the loose wheel M mounted thereon are adjustable at each end of the machine lengthwise of the shaft d, in order to change the position of these parts as may be required to operate tached staves successively between straightguides to crozing and chamfering cutters, and I do not claim a machine of such construction, which is essentially different from my construction, as in that case the staves touch only with the outer edges of their jointed faces, leaving these faces practically unsupported during the operation of chamfering' and crozing, which frequently results in splitting or chipping the staves.

I claim as my iuvention 1. The combination, with the convex and concave guides bearing against opposite sides of the staves, of feed-wheels, whereby the staves are successively fed between the guides, and crozing and chamfering cutters operating against the inner sides of .the staves passing between said guides, substantiallyv as set forth.

2. The combination, with the elevated convex guides bearing against the inner side of the staves,and depressed concave guides bearing against the outer side of the staves, of feed-wheels arranged concentric with said guides, and whereby the staves are successively fed between the said guides.and erozing and chamfering cutters operating against the inner sides of the staves passing between said guides, substantially as set forth.

3. The combination, with the convex and concave stave-guides and the crozing and chamfering cutters, of wheels provided with feed-dogs, whereby the staves are successively fed between said guides and moved past said cutters with their jointed faces in close contact, substantially as set forth.

4. The combination, with the stave-guides and cutters, of feed-wheels L, provided with movable feed-dogs Z, and fixed guides 0, against which said dogs bear and by which said dogs are closed on the staves and released, substantially as set forth. I

5. The combination, with the'stave-guides, of the feed-wheels L, whereby the staves are fed between the guides, and the locse wheels M, whereby the staves are supported, substantially as set forth. 7

6. The combination, with the stave-guides, of the feed-wheels L, whereby the staves are fed between the guides, the loose wheels M, mounted on the same and supporting the staves, and fixed stave-supporting bars N, projecting beyond the feed-wheels and loose supporting-wheels and receiving the staves, substantially as set forth. 1

7. The combination, with the feed-wheels L and loose supporting-wheels M, mounted on the same, of the convex guides H, concave guides J, stationary knives j, and rotary cutter-heads B, substantially as set forth.

8. The combination, with the stave-guides, feed-wheels L, and their shaft 11, of the counvided with dogs Z, guides O, and supportingwheels M, substantially as set forth. :0

Witness my hand this 16th day of May,

J OHN GREENWOOD.

ter-shaft f, end frames, A A, provided with vertical ways, connected bearings d f and d f in which said shafts are jonrnaled, and

springs whereby the bearings are enabled to 1887.

5 yield, substantially as set forth. I

9. The combination, with the nutter-heads B, stationary stave-guides I and J, and stationary knives j, of the feed-wheels L, pro- \Vitnesses:

J. EMORY J ONES, M. A. ,BROOKER. 

